研究目的
Investigating the use of metamaterial-based absorbers for reducing beam-coupling impedance in accelerating structures.
研究成果
The insertion of tailored metamaterials as absorbers in resonant cavities shows potential for mitigating beam instabilities related to collective effects in particle accelerators. SRR-based structures can act as single mode dampers, while hyperbolic metamaterials offer a pathway for broadband absorption.
研究不足
The study focuses on a specific frequency range (1 GHz to 5 GHz) and uses a simplified pillbox cavity model. The applicability to real accelerator components needs further investigation.
1：Experimental Design and Method Selection:
The study involves designing sub-wavelength 2D metallic resonant structures based on split rings or 3D hyperbolic tapered waveguide arrays. The commercial code CST Microwave StudioTM is used for simulations.
2：Sample Selection and Data Sources:
Samples are fabricated on Al2O3 (Alumina) or G10 fiberglass laminates with specific dimensions to resonate at different frequencies.
3：List of Experimental Equipment and Materials:
A 2-port Vectorial Network Analyser (VNA) Rohde & Schwarz ZNB 20 is used for measurements.
4：Experimental Procedures and Operational Workflow:
SRR-based absorbers are placed inside a pillbox cavity, and their effect on the cavity's electromagnetic response is measured.
5：Data Analysis Methods:
The transmission scattering parameter is analyzed to evaluate the impact of the metamaterial absorbers.
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